✅ [RUM-14696] Improve microfrontend e2e test - plugin + module federation

[amortemousque]

Motivation

Improve the microfrontend end-to-end test to rely on a real test app configured with Module Federation and the built plugin.

Changes

• Create a test app with:
  • Module Federation 2.0, including one shell and two remotes
  • The built @datadog/webpack-plugin configured with source code context

• Add tests that verify every RUM event type includes the service and version set by the build plugin

Test instructions

Checklist

• Tested locally
• Tested on staging
• Added unit tests for this change.
• Added e2e/integration tests for this change.
• Updated documentation and/or relevant AGENTS.md file

[datadog-datadog-prod-us1-2]

⚠️ Tests

✨ Fix all issues with BitsAI or with Cursor

⚠️ Warnings

🧪 1 Test failed

microfrontend › RUM › with source code bundler plugin › errors from DD_RUM.addError should have service and version from source code context from microfrontend.scenario.ts (Datadog) (Fix with Cursor)

microfrontend.scenario.ts:243:17 errors from DD_RUM.addError should have service and version from source code context

[Firefox] › microfrontend.scenario.ts:243:17 › microfrontend › RUM › with source code bundler plugin › errors from DD_RUM.addError should have service and version from source code context 

    Error: expect(received).toMatchObject(expected)

    - Expected  - 10
    + Received  +  1

    - Array [
...

ℹ️ Info

❄️ No new flaky tests detected

🎯 Code Coverage (details)
• Patch Coverage: 100.00%
• Overall Coverage: 77.19% (+0.00%)

_{This comment will be updated automatically if new data arrives.
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[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Skip LOAF assertion outside Chromium

This test now runs the long-task assertion on every Playwright project, but the suite still executes Firefox/WebKit projects and those browsers do not emit the long-task entries this assertion depends on (the repo already guards similar checks with test.skip(browserName !== 'chromium', ...) in other scenarios). As written, rumLongTaskEvents can be empty off Chromium, so the strict toMatchObject([...]) expectation makes this scenario fail in multi-browser runs.

Useful? React with 👍 / 👎.

[cit-pr-commenter-54b7da]

Bundles Sizes Evolution

📦 Bundle Name	Base Size	Local Size	𝚫	𝚫%	Status
Rum	172.21 KiB	172.21 KiB	0 B	0.00%	✅
Rum Profiler	4.71 KiB	4.71 KiB	0 B	0.00%	✅
Rum Recorder	24.88 KiB	24.88 KiB	0 B	0.00%	✅
Logs	56.29 KiB	56.29 KiB	0 B	0.00%	✅
Flagging	944 B	944 B	0 B	0.00%	✅
Rum Slim	127.99 KiB	127.99 KiB	0 B	0.00%	✅
Worker	23.63 KiB	23.63 KiB	0 B	0.00%	✅

🚀 CPU Performance

Action Name	Base CPU Time (ms)	Local CPU Time (ms)	𝚫%
addglobalcontext	N/A	0.005	N/A
addaction	N/A	0.0142	N/A
adderror	N/A	0.0163	N/A
addtiming	N/A	0.0039	N/A
startview	N/A	0.0137	N/A
startstopsessionreplayrecording	N/A	0.0009	N/A
logmessage	N/A	0.0199	N/A

🧠 Memory Performance

Action Name	Base Memory Consumption	Local Memory Consumption	𝚫
addglobalcontext	N/A	27.50 KiB	N/A
addaction	N/A	111.69 KiB	N/A
addtiming	N/A	26.27 KiB	N/A
adderror	N/A	115.12 KiB	N/A
startstopsessionreplayrecording	N/A	25.84 KiB	N/A
startview	N/A	514.88 KiB	N/A
logmessage	N/A	44.53 KiB	N/A

🔗 RealWorld

[bcaudan]

LGTM